介词的基本用法与习惯搭配He came back late, ________ which time all the guests had already left
Look! Several people in the crowd seemed .
Do I have to take this medicine? It so terrible.
She looked she were ten years younger.
You’d bettera doctor about your illness. A consult B. advise C. refer to D. discuss
Scientists thousands of chemicals before they decided on the right one in the end .